Abstract: A method includes generating an indicator of interference introduced by a transmitter into a spectrum of an output transmit signal outside a target channel of the transmitter. The indicator is generated based on the output transmit signal. The method includes adjusting a power level of the output transmit signal based on the indicator and a predetermined interference indicator level. The indicator may indicate a carrier-to-interference (C/I) ratio of the output transmit signal, and the adjusting comprises setting the power level of the output transmit signal to a maximum power level that maintains the C/I ratio of the output transmit signal above the predetermined interference indicator level. The output transmit signal may be based on a radio-frequency output of a power amplifier of the transmitter prior to transmission over a channel and the generating comprises generating a baseband version of the output transmit signal.

Abstract: A video processing device includes a decoding device that decodes a compressed audio/video (A/V) signal to generate a decoded A/V signal in a reduced blanking format for transmission via a first home digital media interface. A reformatting device receives the decoded A/V signal via the first home digital media interface and scales the decoded A/V signal into a processed A/V signal for transmission via a second home digital media interface. The first home digital media interface and the second home digital media interface have differing data formats.

Abstract: A method includes generating an indicator of interference introduced by a transmitter into a spectrum of an output transmit signal outside a target channel of the transmitter. The indicator is generated based on the output transmit signal. The method includes adjusting a power level of the output transmit signal based on the indicator and a predetermined interference indicator level. The indicator may indicate a carrier-to-interference (C/I) ratio of the output transmit signal, and the adjusting comprises setting the power level of the output transmit signal to a maximum power level that maintains the C/I ratio of the output transmit signal above the predetermined interference indicator level. The output transmit signal may be based on a radio-frequency output of a power amplifier of the transmitter prior to transmission over a channel and the generating comprises generating a baseband version of the output transmit signal.

Abstract: A method for adjusting transmit power of a wireless communication device begins by determining requirements of a wireless communication between the wireless communication device and a receiving wireless communication device. The method continues by determining whether a current transmit power level of the wireless communication can be lowered without adjusting the requirements of the wireless communication. The method continues by when the current transmit power level of the wireless communication can be lowered without adjusting the requirements of the wireless communication, adjusting the current transmit power level to a second transmit power level, wherein the second transmit power level is less than the current transmit power level.

Abstract: The present invention provides a method for allocating channels in a wireless local area network (WLAN) among a plurality of clients. This method involves first assigning at least one client of the plurality of clients to a channel of a set of active channels. Next, for each client the access time is determined based on an access time factor. Assigning individual clients to channels further involves determining available channel capacity of the set of active channels and the desired channel consumption of the multiple clients. When the available channel capacity is equal to or greater than the desired channel consumption, multiple clients may be assigned to multiple channels.

Abstract: A method signal for decoding in a diversity reception system can include converting the received RF signal into a plurality of digital baseband signals; phase aligning the plurality of digital baseband signals to produce a plurality of phase aligned digital baseband signals; determining a plurality of error terms from the plurality of phase aligned digital baseband signals; one of which corresponding to one of the plurality of phase aligned digital baseband signals; determining a plurality of weighting factors for the plurality of error terms based on characteristics of the plurality of digital baseband signals, one of which corresponding to one of the plurality of error terms; applying the plurality of weighting factors to the plurality of error terms to produce a plurality of weighted error terms; summing the plurality of weighted error terms to produce an error term for decoding.

Abstract: A system is provided for transmitting data to a plurality of devices. A data source receives data from a video broadcasting source, such as a digital television provides, through a data cable. The data source identifies devices to receive particular sets of data, such as particular programs, from the data cable. The data source identifies particular settings for transmitting to particular devices. The data source adjusts a transmission power to a first device to efficiently provide data reliably to the first device. The data source can assign more or less power for transmitting data to the first device. The data source provides data to the source device using a first data channel. The data source provides data to a second device using a second data channel. The data source receives acknowledgements and control information from the first device and the second device using the second data channel.

Abstract: A system and method for communicating with a plurality of devices are disclosed. One embodiment of the method includes transmitting a first plurality of sets of data on a plurality of data channels to a plurality of devices, wherein each of the first plurality of sets of data has a corresponding channel from the plurality of data channels and is transmitted to a corresponding device of the plurality of devices, and receiving a second plurality of sets of data on at least one of the plurality of data channels, wherein the second plurality of sets of data is sent by the plurality of devices, and wherein each of the second plurality of sets of data has a corresponding device of the plurality of devices. The second plurality of sets of data can include an acknowledgement from its corresponding device of the reception of at least one of the first plurality of data sets. Further, different channels of the plurality of data channels can include separate bands of frequencies.

Abstract: A method and apparatus for signal decoding in a diversity reception system with maximum ratio combining are disclosed.

Abstract: The present invention provides a method for allocating channels in a wireless local area network (WLAN) among a plurality of clients. This method involves first assigning at least one client of the plurality of clients to a channel of a set of active channels. Next, for each client the access time is determined based on an access time factor. Assigning individual clients to channels further involves determining available channel capacity of the set of active channels and the desired channel consumption of the multiple clients. When the available channel capacity is equal to or greater than the desired channel consumption, multiple clients may be assigned to multiple channels.

Abstract: A network protocol method (300), access point device (600) and peripheral devices (700, 800) provide an efficient centrally coordinated peer-to-peer wireless communications network wherein the access point device: (1) broadcasts a block assignment that specifies a wireless source peripheral device and a wireless destination peripheral device; (2) receives, from the wireless destination peripheral device, sequence information; (3) determines whether the sequence information represents one of: a negative acknowledgment and a positive acknowledgment with a sequence number; (4) forwards an acknowledgment to the wireless source peripheral based on the sequence information, and repeats steps (1)-(4) until N blocks of data, N a predetermined integer, have been transferred from the wireless source peripheral to the wireless destination peripheral.

Abstract: A transmitter for a communication system transmits consecutive chips of a signal shifted in phase +/-90 degrees +/- nan angle between 0 degrees and 45 degrees which is a function of a spreading gain.

Abstract: The present invention provides a method, system, subscriber unit, and base/headend unit for a bandwidth efficient multiple user digital communication system that facilitates multiple user reverse link communication using overlapped transmit signal spectra of at least two overlap bandwidth subscriber units. Overlap bandwidth subscriber units receive a forward link signal, each deriving a frequency reference from the forward link signal and a symbol timing reference from the forward link signal, and transmitting a reverse link signal to the base/headend unit that receives a composite reverse link signal of the reverse link signals. Each reverse link signal includes at least one modulated data carrier with distinct carrier frequencies. Each transmitted reverse link signal has a symbol timing responsive to the symbol timing reference, and the frequency spectra of the reverse link signals overlap using overlapped transmit signal spectra of at least two overlap bandwidth subscriber units.

Abstract: The present invention provides a communication system, device and method of reverse link symbol timing synchronization of transmited signals to facilitate reverse link timing synchronization. A base unit transmits a forward link signal, receives a reverse link signal, and determines a timing offset for signals received on a reverse link timing synchronization channel, wherein the reverse link synchronization channel comprises a plurality of adjacent reverse link carrier frequencies that are utilized by a multicarrier subscriber unit to facilitate reverse link symbol timing synchronization.

Abstract: An improved automatic frequency correction acquisition system utilizes an automatic frequency correction (AFC) loop (22) having an acquisition mode in which an estimate of the frequency offset of a received carrier signal is rapidly acquired and a tracking mode in which the automatic frequency correction loop more accurately follows changes of the frequency offset. The AFC is switchable in response to predetermined control signals between the acquisition mode and the tracking mode. A carrier to impairment ratio estimator (36) is coupled with the automatic frequency correction loop (22) for estimating the carrier to impairment ratio of the incoming carrier signal.

Abstract: A method and apparatus for mitigating error in a received communications signal includes an error mitigation unit (245) which receives and performs mitigation based on an error indication (e.g., a CRC) and a quality indication (QI). The error mitigation unit may include a magnitude adjuster (220) for adjusting the input signal value (e.g., an ADPCM nibble) when the QI is less than a threshold, and a soft correction unit (240) for, when the QI is above the threshold, either soft correcting nibble magnitudes or muting selective nibbles based on further signal information such as differential phase.

Abstract: A digital phase detector 100 receives a limited input signal 108 and inputs it and a reference oscillation 112 into an EXCLUSIVE NOR gate 102. The output 110 of the EXCLUSIVE NOR gate 102 is input to a gated N-bit counter 104, which produces an N-bit representation of the magnitude of the phase 115 of the signal 108. A sign detector 105 determines the sign of the phase of the signal by sampling the resultant 110 and combines the magnitude of the phase 115 with the sign of the phase to produce a digital numeric representation of the phase of the signal 116.

Abstract: A method and apparatus reduce power consumption in a subscriber unit of a communication system. The subscriber unit has a processor (10) for processing non-voice messages received from the communication system. The method includes the steps of receiving a communication signal (18) at the subscriber unit, detecting a presence or an absence of non-voice messages (20) in the communication signal, and disabling the processor (24) in response to detecting the absence of non-voice messages in the communication signal. The apparatus includes a receiver (12), a message detector (14) and a controller (16) for carrying out the foregoing steps.

Abstract: A method and apparatus is provided for encoding a signal within a radio frequency transmitter 10. The method includes the steps of dividing an information bit stream into a set of successive representations of constellation symbols, each with a symbol interval and finite impulse response filtering each constellation symbol of the set of successive representations of constellation symbols to produce at least one filtered symbol sample per symbol interval. The method further includes the steps of vector adding the at least one filtered symbol sample per symbol interval of the set of successive representations of constellation symbols to produce an output constellation symbol. An apparatus is provided with means for implementing the steps of the method. Included within the apparatus is a low-overhead means of selecting modulation method.

Abstract: An apparatus and method for symbol timing tracking has a decimation index input (42). The decimation index (42) is connected to an upper threshold limiter (44) and a lower threshold limiter (46). The upper threshold limiter (44) is connected to an upper shift register (48). A plurality of cells (52) in the upper shift register (48) are connected to a majority vote logic circuit (54). The majority vote logic circuit (54) is connected to a symbol clock time base (56) and a clocking and clearing control circuit (62). The clocking and clearing control circuit (62) has a clock enable output and a clear signal connected to the upper shift register (48). The lower threshold limiter (46) is connected to a lower shift register (58) that is connected to a second majority vote logic circuit (60).